EVA (ethylene-vinyl acetate) microcapsule foaming master batch and preparation technology

A technology of microcapsule foaming and preparation technology, which is applied in the field of microcapsule foaming masterbatch, EVA microcapsule foaming masterbatch and preparation technology, which can solve the problems of limited application range, improve production efficiency, reduce bending or deformation , The effect of eliminating shrinkage marks

Inactive Publication Date: 2017-08-01
泉州市三生橡塑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the scope of application of this physical blowing agent is still relatively limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] Example: The material structure of the microcapsule foaming masterbatch is composed of 48% ethylene-vinyl acetate copolymer (EVA) powder, 50% microcapsule foaming agent and 2% silicone oil, and its preparation process and steps:

[0024] 1. Grinding: Grinding the component amount of ethylene-vinyl acetate copolymer (EVA) into a powder with a particle size of no more than 100 microns in a special grinding equipment;

[0025] 2. Mixing: Weigh ethylene-vinyl acetate copolymer (EVA) powder, microcapsule foaming agent and silicone oil according to the components, and add the raw materials to the closed mixer at the same time for mixing. The mixing temperature is 65℃ plus or minus 2°C, mixing time 12min.

[0026] 3. Granulation: Add the mixed material to a screw extrusion granulator to granulate. The temperature of granulation is controlled at 55°C plus or minus 2°C. After cooling, EVA microcapsule foaming mother is obtained.

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Abstract

The invention relates to an EVA (ethylene-vinyl acetate) microcapsule foaming master batch and a preparation technology, which comprise a material structure of a microcapsule foaming master batch and preparation technology steps of the microcapsule foaming master batch. The material structure of the microcapsule foaming master batch comprises the following materials in percentage by mass: 33 to 50% of EVA copolymer powder, 40 to 65% of microcapsule foaming agent and 2 to 10% of silicone oil. The preparation technology comprises the steps of firstly, grinding the EVA into the powder with particle size no more than 100 micrometers according to the percentage; then, weighing the EVA powder, the microcapsule foaming agent and the silicone oil according to the percentages, and adding the raw materials into a sealed type mixer to mix, wherein the mixing temperature is 50 to 70 DEG C, the mixing speed is 5 to 20r/min, and the mixing time is 8 to 15min; finally, adding the mixed materials into a screw type extrusion granulator, and granulating, wherein the granulating temperature is 50 to 60 DEG C; cooling, so as to obtain the EVA microcapsule foaming master batch.

Description

[0001] Technical field: [0002] The invention relates to a microcapsule foaming masterbatch, in particular to an EVA microcapsule foaming masterbatch and a preparation process, and belongs to the technical field of polymer auxiliary materials. [0003] Background technique: [0004] At present, the EVA foaming material is composed of EVA matrix, AC foaming agent, crosslinking agent, foaming accelerator, filler, etc., the general mixing temperature is 110-120 ° C, foaming after mixing and granulation, foaming is through The blowing agent decomposes to produce gas. Among them, AC foaming agent has a high decomposition temperature, the lowest decomposition temperature is 140°C, and the energy consumption is large; adding a bridging agent to cross-link EVA achieves the purpose of controlling the gas generated at high temperature in the EVA matrix, but the cross-linked material is not conducive to Recycling; foam accelerator can reduce the decomposition temperature of AC blowing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L83/04C08L33/00C08J9/14C08J3/22
CPCC08L23/0853C08J3/226C08J9/141C08J2203/14C08J2323/08C08J2423/08C08L2205/03C08L83/04C08L33/00
Inventor 王若愚
Owner 泉州市三生橡塑科技有限公司
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